In 'The Geographical Teacher' of Autumn 1921, there was a report of the inaugural meeting of the Isle of Man Branch of the GA. Congratulations on your centenary year.
Source: “Editorial.” The Geographical Teacher, vol. 11, no. 3, 1921, pp. 131–135. JSTOR, www.jstor.org/stable/40555625. Accessed 11 Apr. 2021.